Segmented Solar Module Layout for Edge-Shading Power Retention
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Solution Overview
Problem
Existing solar cell module layouts experience significant power losses and flexibility limitations due to partial shading, particularly along the edges, leading to reduced electrical output and potential damage from heating.
Innovation Solution
A solar cell module design with module segments connected in series via segment connectors, each segment having two subsegments interconnected in series, and solar cell strings arranged in a matrix format with alternating current directions, reducing power losses and mechanical stress through strategic bypass element placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bypass diodes are arranged centrally in the solar cell module, then the module structure is simplified, but power losses increase significantly when edge regions are shaded
Solution Approach 1:
The solar cell module is divided into multiple string groups, with each group containing multiple solar cell strings. Bypass diodes are distributed across different string groups rather than centralized, allowing independent bypass operation for each group. This segmentation enables localized bypass action during edge shading, preventing power losses in unshaded areas while maintaining structural organization.
Solution Approach 2:
Bypass diodes are strategically positioned in different locations within the module, specifically distributed across multiple string groups rather than concentrated in one area. This local distribution ensures that when edge shading occurs, only the affected local string groups activate their bypass diodes, while other parts of the module continue operating at full capacity, thereby reducing overall power losses.
2Device complexity
If solar cell strings are arranged in a single direction, then the module layout is simple, but shading along one edge causes complete bypass of entire module segments
Solution Approach 1:
The module is divided into multiple independent string groups, where each group contains several solar cell strings arranged in parallel. This segmentation allows that when one group is shaded, only that specific group bypasses via its dedicated bypass diode, while other groups continue generating power. This prevents the complete bypass of entire module segments that would occur with a single-direction arrangement.
Solution Approach 2:
Instead of arranging all solar cell strings in a single linear direction, the invention distributes strings across multiple groups in a two-dimensional layout. This dimensional change creates spatial separation between string groups, allowing independent bypass operation for each group during edge shading events, thereby maintaining productivity in unshaded areas.
3Ease of manufacture
If module segments are connected in series with centralized bypass diodes, then manufacturing is simplified, but shading scenarios cause extensive power losses and limit orientation flexibility
Solution Approach 1:
The module is segmented into multiple independent string groups with distributed bypass diodes, allowing different groups to operate independently during shading events. This segmentation maintains manufacturing simplicity through modular assembly while enabling the module to adapt to various shading scenarios and orientations, as each group can bypass independently based on its exposure to shade.
Solution Approach 2:
The bypass system is designed to dynamically respond to shading conditions in each local area. When edge shading occurs, only the affected string groups activate their bypass diodes, while other groups continue normal operation. This dynamic response allows the module to maintain adaptability to different orientations and shading scenarios without complicating the overall manufacturing process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design minimizes power losses and mechanical stress, maintains residual output power during shading, and enhances flexibility by allowing for scalable expansion while reducing hotspot risks and voltage load on bypass elements.
Implementation Method 1
Solar cells are sensitive semiconductor components... each of which has a first and at least a second solar cell string... The solar cell strings extend parallel to the short edge of the solar cell module
Implementation Method 2
at least one bypass element, which is connected in parallel with the subsegments of a module segment
Data Source
AI summary
A solar cell module, having a plurality of module segments, wherein the module segments have at least two subsegments which each have at least one first solar cell string and each solar cell string has a plurality of solar cells interconnected in series.